FreeBSD Man Pages

WHICH(1) FreeBSD General Commands Manual WHICH(1)
NAMEwhich -- locate a program file in the user's path
SYNOPSISwhich [-as] program...DESCRIPTION
The which utility takes a list of command names and searches the path for
each executable file that would be run had these commands actually been
invoked.
The following options are available:
-a List all instances of executables found (instead of just the
first one of each).
-s No output, just return 0 if all of the executables are found, or
1 if some were not found.
Some shells may provide a builtin which command which is similar or iden-
tical to this utility. Consult the builtin(1) manual page.
SEE ALSObuiltin(1), csh(1), find(1), locate(1), whereis(1)HISTORY
The which command first appeared in FreeBSD 2.1.
AUTHORS
The which utility was originally written in Perl and was contributed by
Wolfram Schneider <wosch@FreeBSD.org>. The current version of which was
rewritten in C by Daniel Papasian <dpapasia@andrew.cmu.edu>.
FreeBSD 10.2 December 13, 2006 FreeBSD 10.2